EP0240598B1 - Système pour mesure de niveau - Google Patents

Système pour mesure de niveau Download PDF

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Publication number
EP0240598B1
EP0240598B1 EP86114766A EP86114766A EP0240598B1 EP 0240598 B1 EP0240598 B1 EP 0240598B1 EP 86114766 A EP86114766 A EP 86114766A EP 86114766 A EP86114766 A EP 86114766A EP 0240598 B1 EP0240598 B1 EP 0240598B1
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EP
European Patent Office
Prior art keywords
probe
values
analog
digital
level
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP86114766A
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German (de)
English (en)
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EP0240598A1 (fr
Inventor
Wolfgang Sinz
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Mannesmann VDO AG
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Mannesmann VDO AG
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
    • G01F23/24—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of resistance of resistors due to contact with conductor fluid
    • G01F23/246—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of resistance of resistors due to contact with conductor fluid thermal devices

Definitions

  • the invention relates to a system for level measurement, in particular in a fuel tank, with an analog probe which extends over the level range and which delivers measurement values which are analogous to the level.
  • the film which carries the conductor tracks is arranged vertically in the fuel tank in a correspondingly shaped holder and extends over the entire fill level range.
  • Level measuring devices which have one or more digital probes are known from DE-A 3 148 533 and US-A 4 423 629.
  • EP-A 0 152 644 discloses a device with measuring and compensation electrodes.
  • the object of the present invention is to provide a system for level measurement, in which a predetermined measurement accuracy is maintained over a long time.
  • This object is achieved in that a digital probe, which delivers measured values that change abruptly with the fill level, is arranged, that correction values are derived from a comparison of the measured values of the digital probe and the analog probe, and that the measured values of the analog probe are measured using the Correction values are corrected and displayed.
  • the system according to the invention for level measurement has the advantage that changes in the sensitivity are compensated for by self-calibration of the system.
  • an initial calibration is carried out automatically when the tank is filled for the first time, so that a complex adjustment of the system by the manufacturer can be omitted.
  • the probes can advantageously be formed by temperature-dependent resistors.
  • the invention can also be implemented with the aid of other probes, such as, for example, capacitive probes.
  • the temperature-dependent resistors are formed by conductive layers that are applied to a carrier film.
  • the analog probe comprises a uniform temperature-dependent resistor that extends over the fill level range and that the digital probe includes a resistance that extends over the fill level range, the length-related resistance of one or more fill level values being substantially greater than in the rest of the fill level range.
  • Two selected fill level values can be provided, each of which lies in the upper and lower part of the fill level range. This enables two calibration values to be determined, although in addition to the previous two conductors, only one additional conductor is required between the probe and the electronic circuit.
  • the invention is also not limited to the fact that the digital probe is formed by a resistor, that is to say by a conductor track.
  • a conductor track can be provided for each selected level value.
  • Another development of the invention consists in that the conductive layer forming the digital probe is meandering at the selected fill level values and has a smaller cross section than between the selected values. Furthermore, the digital probe can be applied parallel to the analog probe on the carrier film.
  • Another development is characterized in that current is repeatedly applied to the probes briefly, that the resulting change in resistance is measured, that a new correction value is formed and stored in each case when the measured value of the digital probe is in a range which characterizes a selected level value.
  • the system according to the invention can be implemented in a particularly advantageous manner with the aid of a microcomputer which is provided for the evaluation and correction of the measured values.
  • three conductor tracks 2, 3, 4 are applied to a film 1.
  • the film extends over the vertical extent of a fuel tank, not shown, and is held in guide parts, also not shown. In the upper end, the film with the conductors is led out of the fuel tank, bent approximately at a right angle and inserted into the housing of an evaluation circuit 5.
  • a suitable material for the film is Kapton, while a copper-nickel alloy has proven itself for the conductor tracks.
  • a useful value for the thickness of the conductor tracks is 3 ⁇ m, while the width in the sections of the digital probe to be heated can be a few tenths of a millimeter.
  • the conductor track 2 is provided with a large cross-section for the greater part of its length, so that no annoying heating occurs here either.
  • the cross-section is significantly smaller only for the selected level values fu and fo. So that the resistance or the change in resistance continues to concentrate on these selected fill level values, the conductor track 2 is formed in a meandering manner in the area of these fill level values.
  • the conductor track 4 serves as a common return line for the conductor tracks 2 and 3 designed as probes.
  • the analog probe 3 and the digital probe 2 are briefly each subjected to a constant current.
  • the voltage increase that occurs during the duration of the current flow is a measure of the increase in resistance and thus of the portion of the probe that is not covered with liquid.
  • FIG. 2 The temporal processes are shown in Fig. 2.
  • Line a) shows the course of the current i through the analog probe 3. A time for the current flow of one second has proven useful. For example, the measurement can be repeated every 30 seconds.
  • line b) of FIG. 2 the course of the voltage u is plotted on the analog probe. The voltage increases suddenly when the current is switched on and then increases while the current remains constant due to the heating of the conductor track 3.
  • the conductor track is covered with liquid, there is approximately the lower limit of the hatched triangle, while when the fuel tank is empty, that is to say if the entire conductor track 3 is surrounded by air, the increase in voltage lies at the upper limit of the hatched triangle.
  • the resistance can be measured shortly before the current i is switched off. However, many measurements can also be carried out within the energization time, the results of which are summed up, so that the area of a triangle is available as a measure of the fill level.
  • the digital probe 2 is supplied with current. This ensures that between the two measurements there are no significant changes in the level and other variables influencing the measurement result, such as the temperature of the fuel.
  • the current i is constant, as with the analog probe 3.
  • the voltage u only increases slightly when the liquid level is above fo, which is indicated in FIG. 2d) by the line 6. If the liquid level is between the values fo and fu, there is an increase according to line 7, while at a liquid level below fu there is a rapid increase according to line 8.
  • the changes in resistance dR are plotted as a function of the level f in FIG. 3 - specifically in diagram a) for digital probe 2 and in diagram b) for analog probe 3. While the change in resistance dR is greatest when the fuel tank is empty, it increases it suddenly drops in the immediate vicinity of the value fu, in order then to remain approximately constant at half the height between the values fu and fo. A further jump occurs at fo, after which the value dR remains very low up to the maximum fill level V. If the signal of the digital probe is now fed to two window discriminators, with the windows Fu and Fo, it can be concluded from the output signals of the window discriminators that the fill level is at the selected values fu and fo. The curve shown in diagram b) results from the measurement with the analog probe 3. Since the values fu and fo are precisely determined by the dimensions of the probe, correction values can be determined by comparing the measurement results of the analog probe with the level values fo and fu, which can then be transferred to all values of the analog probe using known calculation rules.
  • FIG. 4 shows a circuit arrangement with which the evaluation already described in connection with FIGS. 2 and 3 can be carried out. It comprises a microcomputer, the most important components of which are shown schematically. These are the central unit 11, a program memory 12, a variable memory 13, an input / output unit 14 and a bus system 15. A non-volatile memory is attached to the input / output unit 14 rather 16 and a display device 17, for example a liquid crystal display, connected. However, the display can also be made by an analog instrument, to which the measured values are fed via a digital analog converter. It is also possible to supply the digital signals to an on-board computer which, for example, calculates the fuel consumption and / or the remaining range of the vehicle. However, a microcomputer can also perform the functions for the system according to the invention as well as further functions of a so-called on-board computer.
  • connection 18 of the circuit arrangement is connected to the positive pole of the vehicle battery.
  • a diode 19 serves as reverse polarity protection, while a resistor 20 and a capacitor 21 form a filter element.
  • a stabilizing operating voltage is generated for the individual assemblies of the circuit arrangement with the aid of a stabilizing circuit 22. Only probes 2 and 3 are not connected to the stabilized operating voltage, since the current through the probes is regulated anyway.
  • transistors 23 and 24 and the resistor 25 serve as a constant current source for the digital probe 2.
  • transistors 26 and 27 and a resistor 28 are provided as a constant current source for the analog probe 3. Since current is applied to both probes one after the other, only one control circuit or one analog / digital converter is provided both for regulating this current and for measuring the voltages falling across the probes.
  • the control loop is formed from a differential amplifier 29, a changeover switch 30, the constant current sources already mentioned, the probes 2, 3 and a resistor 31.
  • a voltage proportional to the respective current drops across the resistor 31 and is supplied as an actual value to the inverting input of the differential amplifier 29.
  • a constant reference voltage Ur is applied to the non-inverting input of the differential amplifier 29.
  • the output voltage of the differential amplifier 29 is alternately fed to the constant current sources for the digital probe 2 and the analog probe 3 with the aid of the switch 30.
  • the changeover switch 30 is controlled in a suitable manner by the microcomputer.
  • a multiplexer 32 connects in the same direction as the switch 30 one of the probes 2, 3 to the input of an analog / digital converter 33.
  • the voltage which drops across the resistor 31 is supplied to the analog / digital converter 33 as a reference voltage. This ensures that only the voltage drops at probes 2 and 3 are fed to the analog / digital converter 33 and are entered as digital values in the microcomputer.
  • FIG. 5 shows part of the program stored in the program memory 12.
  • the timing including the switch 30 and the multiplexer 32.
  • a function test of the analog probe follows at 42, which consists, for example, in that the resistance value of the analog probe is measured at extremely low current.
  • the measurement data is then recorded at 43, as described in connection with FIGS. 2 and 3.
  • a functional test of the digital probe is carried out in program part 44, followed by data acquisition from the digital probe in program part 45.
  • junction 46 it is checked whether the measurement data determined are in one of the windows Fo and Fu (FIG. 3). If this is the case, the basic data are replaced by analog data at 47. If the measured values of the digital probe are not in one of the windows, the basic data remain unchanged and the program is continued at 48.

Claims (9)

1. Système de mesure de niveau, en particulier dans un réservoir de carburant, ce système comportant une sonde analogique qui s'étend sur la zone des niveaux, et qui fournit des valeurs de mesure analogiques par rapport au niveau, système caractérisé en ce qu'il y a en outre une sonde numérique (2), qui fournit des valeurs de mesure qui varient en même temps que le niveau, avec des sautes; en ce que des valeurs de correction sont déduites d'une comparaison entre les valeurs de mesure de la sonde numérique (2) et celles de la sonde analogique (3); et en ce que les valeurs de mesure de la sonde analogique (3) sont corrigées à l'aide des valeurs de correction, et affichées.
2. Système selon la revendication 1, caractérisé en ce que les sondes (2, 3) sont formées par des résistances dont la valeur dépend de la température.
3. Système selon la revendication 2, caractérisé en ce que les résistances dont la valeur dépend de la température sont formées par des couches conductrices déposées sur une feuille mince (1) de support.
4. Système selon la revendication 3, caractérisé en ce que la sonde analogique 3 comprend une résistance dont la valeur dépend de la température, dont la forme est partout la même et qui s'étend sur la zone des niveaux, et en ce que la sonde numérique (2) comprend une résistance qui s'étend sur la zone des niveaux et dont la résistance, rapportée à la longueur, est, à l'emplacement d'une ou plusieurs valeurs de niveau (fu, fo) sélectionnées, sensiblement plus grande que dans le reste de la zone ou plage de niveaux.
5. Système selon la revendication 4, caractérisé en ce qu'il est prévu deux valeurs (fo, fu) sélectionnées de niveau, qui se situent respectivement dans la partie supérieure et dans la partie inférieure de la zone ou plage de niveaux.
6. Système selon la revendication 5, caractérisé en ce que la couche conductrice qui forme la sonde numérique (2) est conformée en méandre(s) à l'emplacement des valeurs de niveau choisies (fo, fu) et présente une section transversale plus faible qu'entre les valeurs de niveau choisies.
7. Système selon la revendication 6, caractérisé en ce que la sonde numérique (2) est disposée parai- lèlement à la sonde analogique (3) sur la feuille mince (1) de support.
8. Système selon la revendication 1, caractérisé en ce que les sondes (2, 3) sont alimentées, brièvement et de façon répétée, par un courant; en ce que la variation de résistance qui en résulte est mesurée en ce que, dans chaque cas, une nouvelle valeur de correction est établie et est mise en mémoire lorsque la valeur de mesure obtenue à l'aide de la sonde numérique (2) se trouve dans une zone caractéristique (Fo, Fu) d'une valeur de niveau sélectionnée.
9. Système selon une des revendications précédentes, caractérisé en ce qu'on prévoit un microprocesseur pour l'exploitation et pour la correction des valeurs de mesure.
EP86114766A 1986-01-16 1986-10-23 Système pour mesure de niveau Expired - Lifetime EP0240598B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19863601100 DE3601100A1 (de) 1986-01-16 1986-01-16 System zur fuellstandsmessung
DE3601100 1986-01-16

Publications (2)

Publication Number Publication Date
EP0240598A1 EP0240598A1 (fr) 1987-10-14
EP0240598B1 true EP0240598B1 (fr) 1990-01-03

Family

ID=6291954

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86114766A Expired - Lifetime EP0240598B1 (fr) 1986-01-16 1986-10-23 Système pour mesure de niveau

Country Status (5)

Country Link
US (1) US4789946A (fr)
EP (1) EP0240598B1 (fr)
JP (1) JPS62169021A (fr)
BR (1) BR8700150A (fr)
DE (2) DE3601100A1 (fr)

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8722414D0 (en) * 1987-09-23 1987-10-28 Veeder Root Ltd Determining amount of material in tank
DE3822846A1 (de) * 1988-07-06 1990-01-11 Vdo Schindling Geraet zur messung des fuellstands eines kraftstofftanks
DE3912781A1 (de) * 1989-04-19 1990-10-25 Bayerische Motoren Werke Ag System zur fuellstandsmessung, insbesondere in einem kraftstoffbehaelter
DE4008031A1 (de) * 1990-03-14 1991-09-19 Vdo Schindling Anordnung zur messung einer fluessigkeitsmenge
DE4008030A1 (de) * 1990-03-14 1991-09-19 Vdo Schindling Fuellstandsgeber
US5172007A (en) * 1991-04-15 1992-12-15 Jabil Circuit Company Corrosion inhibiting switched polarity fuel level sender module
US5225813A (en) * 1991-11-12 1993-07-06 Marine Power And Control, Inc. Liquid fuel overflow prevention system
FR2690521B1 (fr) * 1992-04-24 1994-07-29 Jaeger Dispositif de mesure de niveau de liquide a fil chaud.
US5363093A (en) * 1992-08-11 1994-11-08 Tanknology Corporation International Method and apparatus for continuous tank monitoring
FR2703774B1 (fr) * 1993-04-09 1995-07-07 Jaeger Dispositif de mesure de niveau et/ou de volume de liquide a fil resistif immerge.
DE4403473A1 (de) * 1994-02-04 1995-08-31 Vdo Schindling Füllstandssensor
US5866426A (en) * 1996-12-17 1999-02-02 Akzo Nobel N.V. Device and method for determining liquid-probe contact
FR2820199B1 (fr) * 2001-01-31 2003-05-02 Sc2N Sa Dispositif de mesure du niveau d'un liquide
WO2009089339A2 (fr) * 2008-01-09 2009-07-16 Diraction, Llc Séparation de phases automatisée et capteur de qualité de carburant
US8878682B2 (en) * 2009-10-16 2014-11-04 Franklin Fueling Systems, Inc. Method and apparatus for detection of phase separation in storage tanks using a float sensor
JP5422508B2 (ja) * 2010-07-15 2014-02-19 株式会社東芝 水位検出電極ユニット及び水位検出装置
US8601867B2 (en) 2010-07-26 2013-12-10 Veeder-Root Company Magnetostrictive probe having phase separation float assembly
US8789564B2 (en) * 2011-01-21 2014-07-29 Marathon Petroleum Company Lp Asphalt loading arm
JP6158057B2 (ja) 2013-12-04 2017-07-05 株式会社東芝 電極式液位検出装置及び電極式液位検出方法
US10267665B2 (en) 2016-01-12 2019-04-23 Tank Vision, Inc. Fuel tank level monitoring system
US11814506B2 (en) 2019-07-02 2023-11-14 Marathon Petroleum Company Lp Modified asphalts with enhanced rheological properties and associated methods

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5415646U (fr) * 1977-07-01 1979-02-01
DE2841889B2 (de) * 1978-09-26 1980-09-25 Siemens Ag, 1000 Berlin Und 8000 Muenchen Vorrichtung zur kontinuierlichen Messung des Füllstandes in einem mit Flüssigkeit zumindest teilweise gefüllten Behälter
IT1131315B (it) * 1980-06-13 1986-06-18 Logic Spa Sistema di rilevamento e segnalazione della quantita' di carburante contenuto in un serbatoio di veicoli,particolarmente di veicoli aerei
DE3022398A1 (de) * 1980-06-14 1982-01-07 Vdo Adolf Schindling Ag, 6000 Frankfurt Einrichtung zum elektrischen ueberwachen des niveaus einer in einem behaelter enthaltenen fluessigkeit
JPS5764115A (en) * 1980-10-07 1982-04-19 Japan Atom Energy Res Inst Method and apparatus detecting liquid level
FR2514497A1 (fr) * 1981-10-08 1983-04-15 Jaeger Dispositif de detection numerique de niveau par fil chaud
DE3148533C2 (de) * 1981-12-08 1986-08-21 Siemens AG, 1000 Berlin und 8000 München Vorrichtung zur Messung des Füllstandes in einem eine Flüssigkeit enthaltenden Behälter
US4590575A (en) * 1981-12-15 1986-05-20 Robertshaw Controls Company Dielectric compensated level control system for use in tanks containing substance
EP0152644A3 (fr) * 1983-12-01 1988-06-29 Richard Mulder Dispositif pour mesurer le niveau et la conductance d'un liquide entre deux électrodes
DE3423802A1 (de) * 1984-06-28 1986-01-02 Vdo Adolf Schindling Ag, 6000 Frankfurt Verfahren und einrichtung zur elektrothermischen, umgebungstemperatur-kompensierten fuellstandsmessung
US4706203A (en) * 1984-12-17 1987-11-10 Simmonds Precision Products, Inc. Capacitive gauging method and apparatus

Also Published As

Publication number Publication date
US4789946A (en) 1988-12-06
JPS62169021A (ja) 1987-07-25
DE3601100A1 (de) 1987-07-23
EP0240598A1 (fr) 1987-10-14
DE3668060D1 (de) 1990-02-08
BR8700150A (pt) 1987-12-01

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